If you are looking to make the standard PT Pyramid a little tougher, try adding in the TRX Atomic pushup in place of the regular pushup. Even if you fail on pullups, you can replace the pullups with the TRX row. The beauty of the TRX is its versatility. The device can make simple exercises tougher or more difficult exercises easier using the same muscle groups. Here is a complete warmup, workout, and cardio cooldown options creating the complete workout below:

Pushups run pyramid 1-10 - 1 pushup, run 25m - 2 pushups, run 25...keep going up until 10 – stop or other type of warmup prior to the workout if you prefer.